Shape of shop, dire, unfortunately (8)
I believe the answer is:
spheroid
'shape' is the definition.
(I know that spheroid is a type of shape)
'shop dire unfortunately' is the wordplay.
'unfortunately' indicates anagramming the letters (a bad or unfortunate spelling).
'shop'+'dire'='shopdire'
'shopdire' anagrammed gives 'SPHEROID'.
'of' is the link.
(Other definitions for spheroid that I've seen before include "Almost the shape of a ball" , "Round shape" , "Solid" , "Kind of globe, not perfectly round" , "Almost-perfect-ball shape" .)